CN110756798A - Magnetic core die - Google Patents
Magnetic core die Download PDFInfo
- Publication number
- CN110756798A CN110756798A CN201810845861.8A CN201810845861A CN110756798A CN 110756798 A CN110756798 A CN 110756798A CN 201810845861 A CN201810845861 A CN 201810845861A CN 110756798 A CN110756798 A CN 110756798A
- Authority
- CN
- China
- Prior art keywords
- magnetic core
- flash hole
- hole
- die
- protruding portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000748 compression moulding Methods 0.000 claims abstract description 3
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
Abstract
The invention discloses a magnetic core die. The magnetic core die is used for compression molding of a product to be molded and comprises an upper die, a lower die, a female die and a core rod, wherein the core rod is provided with a base and an ejection part, and the ejection part is provided with an extension part and a support part which are sequentially connected along the extension direction of the ejection part. The extending part extends into the concave die cavity from the bottom of the lower die, and the size of the extending part is matched with that of the hole to be formed. The supporting portion is connected between the protruding portion and the base, and a size of a cross section of the protruding portion is smaller than a size of a cross section of the supporting portion. The connection position of the extending part and the supporting part is abutted against the bottom surface of the lower die. The supporting part and the connecting position of the stretching part are abutted to the bottom surface of the lower die, so that the supporting part can be increased in stress support of the lower die, the stretching part can achieve smaller section size through the structural arrangement, and the press forming of a product to be formed with a smaller forming hole can be achieved.
Description
Technical Field
The invention relates to a magnetic core die.
Background
With the continuous development of small size, high precision and high packing density of electronic products for household electrical appliances communication. Due to limitations in equipment and mandrel configurations, etc., it is difficult to form by pressing a miniaturized product having extremely small holes (e.g., 1.77mm by 0.3mm kidney-shaped holes). The core rod mold generally includes a female mold, an upper mold, a lower mold and a core rod (the core rod includes a base and an ejection portion connected to the base), the upper mold and the lower mold are arranged oppositely and respectively extend into the female mold, a cavity is defined between the upper mold, the lower mold and the female mold, the upper mold and the lower mold are pressed and molded in the cavity to form a product to be molded, and then the ejection portion of the core rod extends into the cavity from the bottom of the lower mold to eject the product to be molded. However, in the conventional mandrel bar, the sectional dimensions of the ejector portions in the extending direction are all equal, and the sectional dimension of the ejector portion is large. That is, the core rod die in the related art has difficulty in achieving pressing of a product to be formed having a hole of a smaller size.
In summary, the magnetic core mold in the prior art has a defect that it is difficult to realize pressing of a product to be molded having a hole with a smaller size.
Disclosure of Invention
The invention aims to overcome the defect that a magnetic core die in the prior art is difficult to press a product to be molded with a hole with a smaller size, and provides a magnetic core die.
The invention solves the technical problems through the following technical scheme:
the utility model provides a magnetic core mould for the shaping product is treated in the compression moulding, treat that the shaping product has and treat the shaping hole, the magnetic core mould includes mould, lower mould, female type and plug, go up the mould the lower mould with enclose into die cavity between the female type, the plug have the base and connect in the ejecting portion of base, its characterized in that, ejecting portion follows the extending direction of ejecting portion has and connects gradually:
the extension part extends into the concave die cavity from the bottom of the lower die, and the size of the extension part is matched with that of the hole to be formed;
a support portion connected between the protruding portion and the base, and a cross-sectional size of the protruding portion is smaller than a cross-sectional size of the support portion;
wherein, the connection position of the extending part and the supporting part is abutted against the bottom surface of the lower die.
In this scheme, the size of the cross section of support portion is greater than the size of the cross section of the portion that stretches into, and the junction position department butt in the bottom surface of lower mould of support portion and the portion that stretches into for support portion can increase the atress support to the lower mould. The structure arrangement enables the stretching part to realize smaller section size, thereby realizing the press forming of the product to be formed with smaller forming holes to be formed.
Preferably, the ratio of the width of the cross section of the supporting part to the width of the cross section of the extending part ranges from 1.1 to 1.5.
In the scheme, if the ratio is too small, the core rod can make the magnetic core die more difficult to mold the hole to be molded with a smaller size; if the ratio is too large, the material will be wasted.
Preferably, the thickness of the protruding part ranges from 0.2 mm to 0.5 mm.
Preferably, the width of the extending part is 1.77mm, the thickness is 0.3mm, and the supporting part is a cylindrical structure with the diameter of 2 mm.
Preferably, one end of the lower die close to the cavity has a first overflow hole, and the first overflow hole is communicated with a containing hole in the lower die, into which the extending part extends.
In this scheme, the first flash hole can prevent the damage of the powder granule of suppression usefulness to the plug, is favorable to improving the reliability of suppression.
Preferably, the first flash hole is arranged on the outer wall surface of the lower die, and a gap larger than 0 is formed between the outer edge of one end of the first flash hole close to the cavity and the corresponding end surface of the lower die.
In this scheme, the setting position of first flash hole is favorable to improving the intensity of plug, is favorable to further improving the reliability of suppression.
Preferably, one end of the upper die close to the cavity has a second flash hole, the second flash hole is communicated with the inside of the upper die, and the second flash hole and the first flash hole are located on the same side of the mandrel.
In the scheme, the first flash hole is matched with the second flash hole, so that the core rod can be prevented from being damaged by powder particles for pressing to a greater extent, and the reliability of pressing is favorably improved.
Preferably, the second flash hole is formed in an outer wall surface of the upper die.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
in the magnetic core mould, the size of the cross section of the supporting part is larger than that of the cross section of the extending part, and the connecting position of the supporting part and the extending part is abutted against the bottom surface of the lower mould, so that the supporting part can increase the stress support to the lower mould. The structure arrangement enables the stretching part to realize smaller section size, thereby realizing the press forming of the product to be formed with smaller forming holes to be formed.
Drawings
Fig. 1 is a schematic structural diagram of a core rod in a magnetic core mold according to a preferred embodiment of the invention.
Fig. 2 is a schematic structural diagram of another position state of the core rod in the magnetic core mold according to a preferred embodiment of the invention.
Fig. 3 is a schematic structural diagram illustrating a core rod in a core mold according to another position state of the core rod in the core mold according to a preferred embodiment of the invention.
Fig. 4 is a schematic structural diagram of an upper mold of a magnetic core mold according to a preferred embodiment of the invention.
Fig. 5 is a schematic structural diagram of a lower mold of a magnetic core mold according to a preferred embodiment of the invention.
Fig. 6 is a schematic structural diagram of a female mold in a magnetic core mold according to a preferred embodiment of the invention.
Description of reference numerals:
10 upper die
101 second flash hole
20 lower die
201 first flash hole
30 female type
40 core rod
401 base
402 protruding part
403 support part
Detailed Description
The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.
The present embodiment discloses a core mold for press-molding a product to be molded having a hole to be molded, as will be understood with reference to fig. 1 to 6, the core mold comprising an upper mold 10, a lower mold 20, a female mold 30, and a core rod 40, a cavity being defined between the upper mold 10, the lower mold 20, and the female mold 30, the core rod 40 having a base 401 and an ejector portion connected to the base 401, the ejector portion having an insertion portion 402 and a support portion 403 connected in series along an extending direction of the ejector portion. Wherein the protruding portion 402 protrudes from the bottom of the lower mold 20 into the cavity, and the size of the protruding portion 402 is adapted to the size of the hole to be formed. The supporting portion 403 is connected between the protruding portion 402 and the base 401, and the size of the cross section of the protruding portion 402 is smaller than that of the supporting portion 403; the joining position of the protruding portion 402 and the supporting portion 403 abuts against the bottom surface of the lower die 20.
In the present embodiment, the size of the cross section of the supporting portion 403 is larger than that of the cross section of the protruding portion 402, and the connecting position of the supporting portion 403 and the protruding portion 402 abuts against the bottom surface of the lower mold 20, so that the supporting portion 403 can increase the forced support to the lower mold 20. This structural arrangement enables the protruding portion 402 to achieve a smaller cross-sectional size, thereby enabling press forming of a product to be formed having a smaller hole to be formed.
Further, the ratio of the width of the cross section of the supporting portion 403 to the width of the cross section of the protruding portion 402 is in the range of 1.1 to 1.5, and the thickness of the protruding portion is in the range of 0.2 to 0.5 mm. If the ratio is too small, the core rod can make the magnetic core die difficult to mold a hole to be molded with a smaller size; if the ratio is too large, the material will be wasted. Specifically, in the present embodiment, the protruding portion has a width of 1.77mm and a thickness of 0.3mm, and the supporting portion is a cylindrical structure having a diameter of 2 mm. At this time, the ratio of the width of the cross section of the supporting portion 403 to the width of the cross section of the protruding portion 402 is about 1.3. In other alternative embodiments, the diameter of the supporting portion and the specific cross-sectional dimension of the protruding portion may be adjusted within the above-mentioned ratio range according to actual needs.
Further, in the present embodiment, the protruding portion 402 has a width of 1.77mm and a thickness of 0.3mm, and the supporting portion 403 has a cylindrical structure with a diameter of 2 mm.
Further, the lower mold 20 has a first flash hole 201 at an end thereof adjacent to the cavity, and the first flash hole 201 communicates with a receiving hole in the lower mold 20 into which the protruding portion 402 protrudes.
The first flash hole 201 can prevent the core rod 40 from being damaged by powder particles for pressing, and is beneficial to improving the reliability of pressing.
Further, the first flash hole 201 is provided on the outer wall surface of the lower mold 20, and a gap greater than 0 is provided between an outer edge of one end of the first flash hole 201 close to the cavity and the end surface of the corresponding lower mold 20. The position of the first flash hole 201 is advantageous for improving the strength of the mandrel bar 40, and is advantageous for further improving the pressing reliability.
Furthermore, one end of the upper die 10 close to the cavity has a second flash hole 101, the second flash hole 101 is communicated with the inside of the upper die 10, the second flash hole 101 and the first flash hole 201 are located on the same side of the core rod 40, and the second flash hole 101 is located on the outer wall surface of the upper die 10. . The first flash hole 201 and the second flash hole 101 are matched, so that the core rod 40 can be prevented from being damaged by powder particles for pressing to a greater extent, and the reliability of pressing can be further improved.
In the core mold, the size of the cross section of the supporting portion 403 is larger than that of the cross section of the protruding portion 402, and the connecting position of the supporting portion 403 and the protruding portion 402 abuts against the bottom surface of the lower mold 20, so that the supporting portion 403 can increase the forced support to the lower mold 20. This structural arrangement enables the protruding portion 402 to achieve a smaller cross-sectional size, thereby enabling press forming of a product to be formed having a smaller hole to be formed.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (8)
1. The utility model provides a magnetic core mould for the shaping product is treated in the compression moulding, treat that the shaping product has and treat the shaping hole, the magnetic core mould includes mould, lower mould, female type and plug, go up the mould the lower mould with enclose into die cavity between the female type, the plug have the base and connect in the ejecting portion of base, its characterized in that, ejecting portion follows the extending direction of ejecting portion has and connects gradually:
the extension part extends into the concave die cavity from the bottom of the lower die, and the size of the extension part is matched with that of the hole to be formed;
a support portion connected between the protruding portion and the base, and a cross-sectional size of the protruding portion is smaller than a cross-sectional size of the support portion;
wherein, the connection position of the extending part and the supporting part is abutted against the bottom surface of the lower die.
2. The magnetic core according to claim 1, wherein a ratio of a width of a cross section of the support portion to a width of a cross section of the protruding portion is in a range of 1.1 to 1.5.
3. A magnetic core according to claim 2, wherein the thickness of the protruding portion is in the range of 0.2 to 0.5 mm.
4. A magnetic core according to claim 2, wherein the protruding portion has a width of 1.77mm and a thickness of 0.3mm, and the support portion is a cylindrical structure having a diameter of 2 mm.
5. The core according to claim 1 wherein the lower mold has a first flash hole at an end thereof adjacent to the cavity, the first flash hole communicating with a receiving hole in the lower mold into which the protruding portion protrudes.
6. The magnetic core according to claim 5, wherein the first flash hole is formed in an outer wall surface of the lower mold, and a gap greater than 0 is formed between an outer edge of one end of the first flash hole close to the cavity and an end surface of the corresponding lower mold.
7. The magnetic core according to claim 5, wherein the upper mold has a second flash hole at an end thereof adjacent to the cavity, the second flash hole communicating with an interior of the upper mold, and the second flash hole and the first flash hole being located on a same side of the core rod.
8. The magnetic core according to claim 7, wherein the second flash hole is formed in an outer wall surface of the upper mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845861.8A CN110756798A (en) | 2018-07-27 | 2018-07-27 | Magnetic core die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810845861.8A CN110756798A (en) | 2018-07-27 | 2018-07-27 | Magnetic core die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110756798A true CN110756798A (en) | 2020-02-07 |
Family
ID=69328000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810845861.8A Pending CN110756798A (en) | 2018-07-27 | 2018-07-27 | Magnetic core die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110756798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380534A (en) * | 2021-05-21 | 2021-09-10 | 无锡蓝沛新材料科技股份有限公司 | Die for preparing integrally formed inductor and preparation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT195225B (en) * | 1956-05-29 | 1958-01-25 | Ventrex Ing R Adam Ventil Meta | Method and device for the production of moldings of any cross-sectional shape |
| CN1426075A (en) * | 2001-12-12 | 2003-06-25 | 浙江天通电子股份有限公司 | Forming method for soft magnetic ferrite core and mould structure |
| CN203470525U (en) * | 2013-09-17 | 2014-03-12 | 中南大学 | Aluminum alloy water-cooled plate divergent extrusion mold comprising ultra-small-diameter mold core |
| CN205519655U (en) * | 2016-01-29 | 2016-08-31 | 株洲华宏机械制造有限公司 | Sprayer valve body injection moulding mould |
| CN106513455A (en) * | 2017-01-06 | 2017-03-22 | 东莞市奥达铝业有限公司 | Porous complex section aluminum profile mold structure and inlaid core machining method |
-
2018
- 2018-07-27 CN CN201810845861.8A patent/CN110756798A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT195225B (en) * | 1956-05-29 | 1958-01-25 | Ventrex Ing R Adam Ventil Meta | Method and device for the production of moldings of any cross-sectional shape |
| CN1426075A (en) * | 2001-12-12 | 2003-06-25 | 浙江天通电子股份有限公司 | Forming method for soft magnetic ferrite core and mould structure |
| CN203470525U (en) * | 2013-09-17 | 2014-03-12 | 中南大学 | Aluminum alloy water-cooled plate divergent extrusion mold comprising ultra-small-diameter mold core |
| CN205519655U (en) * | 2016-01-29 | 2016-08-31 | 株洲华宏机械制造有限公司 | Sprayer valve body injection moulding mould |
| CN106513455A (en) * | 2017-01-06 | 2017-03-22 | 东莞市奥达铝业有限公司 | Porous complex section aluminum profile mold structure and inlaid core machining method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113380534A (en) * | 2021-05-21 | 2021-09-10 | 无锡蓝沛新材料科技股份有限公司 | Die for preparing integrally formed inductor and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105619713B (en) | Liquid-state silicon gel Inset ejection molding mold | |
| CN110756798A (en) | Magnetic core die | |
| US20090183527A1 (en) | Mold apparatus with multi-molding chamber | |
| CN204430267U (en) | Cylinder permanent magnet mould | |
| CN206475388U (en) | A kind of injection mold for being used to be molded toy car tire | |
| CN213496482U (en) | Powder metallurgy die | |
| CN201252184Y (en) | Cable connector component | |
| CN201848969U (en) | Injection molding die | |
| CN110027094B (en) | Ferrite magnetic ring radial wet pressing die | |
| CN202241546U (en) | Forming die for manufacturing die core rod from hard alloy material | |
| CN208604039U (en) | A kind of low degree of eccentricity abnormity powder column spiral shell molding die | |
| CN208528085U (en) | Magnetic core mold | |
| CN207538621U (en) | Limiter metal case | |
| CN105499330A (en) | Plate machining die | |
| CN206140810U (en) | Ejecting injection mold of simple and convenient secondary | |
| CN202572834U (en) | Injection mold | |
| CN107283764A (en) | ejecting structure and mould | |
| CN212764521U (en) | Helical gear rotary demoulding device | |
| CN209822951U (en) | Quick crimping injection moulding's USB interface | |
| CN212725650U (en) | Pin for plug inner frame | |
| CN216989719U (en) | Split type forging and pressing mould | |
| CN207642101U (en) | A kind of side plate or so end iron clad molding die | |
| CN212602832U (en) | Mould capable of being quickly connected and assembled for plastic products | |
| CN203697398U (en) | High-efficiency long-life injection molding sole mold | |
| CN217373178U (en) | Power module shell injection mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |